49-er gold mining - Media Collections Online
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The Official Page for the 49ers Gold Rush Fan Section
Golden Opportunities
49er Gold Miner
A Day in the Life of a California 49er - Gold Prospectors Association of America
Mining, Free Full-Text
California's Gold Rush Lives On At Temecula Valley Museum
The impact of gold mining and agricultural concessions on the tree cover and local communities in northern Myanmar
A global-scale data set of mining areas
Economic estimation of Bitcoin mining's climate damages demonstrates closer resemblance to digital crude than digital gold
Prospecting for Gold With the New 49ers - Pacific Standard
Gold - Wikipedia
49er Gold Prospecting Supplies –
Risks of mining to salmonid-bearing watersheds
Map of the mining district of California.
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por adulto (o preço varia de acordo com o tamanho do grupo)